package daos;

import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Order;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import pku.ss.movieSystem.common.Constants;
import pku.ss.movieSystem.common.PaginationSupport;

/**
 * A data access object (DAO) providing persistence and search support for News
 * entities. Transaction control of the save(), update() and delete() operations
 * can directly support Spring container-managed transactions or they can be
 * augmented to handle user-managed Spring transactions. Each of these methods
 * provides additional information for how to configure it for the desired type
 * of transaction control.
 * 
 * @see daos.News
 * @author MyEclipse Persistence Tools
 */

public class NewsDAO extends HibernateDaoSupport {
	private static final Log log = LogFactory.getLog(NewsDAO.class);
	// property constants
	public static final String NEWS_TITLE = "newsTitle";
	public static final String NEWS_CONTENT = "newsContent";
	public static final String NEWS_PUBLISHER = "newsPublisher";
	public static final String NEWS_PUBLISHTIME = "newsPublishTime";
	

	protected void initDao() {
		// do nothing
	}

	public void save(News transientInstance) {
		log.debug("saving News instance");
		try {
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(News persistentInstance) {
		log.debug("deleting News instance");
		try {
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}
 
	public void deleteById(Integer newsId) {
		String hql = "delete from News where newsId=:newId";
		Query query = getHibernateTemplate().getSessionFactory().getCurrentSession().createQuery(hql);
		
		query.setParameter("newId", newsId);
		query.executeUpdate();
	}
	
	public void updateNews(News news) {
		String hql = "update News set user=:nuser," +
				" newsTitle=:nnewsTitle, newsContent=:nnewsContent, newsPublisher=:nnewsPublisher, newsPublishTime=:nnewsPublishTime" +
				" where newsId=:newId";
		Query query = getHibernateTemplate().getSessionFactory().getCurrentSession().createQuery(hql);
		
		query.setParameter("nuser", news.getUser());
		query.setParameter("nnewsTitle", news.getNewsTitle());
		query.setParameter("nnewsContent", news.getNewsContent());
		query.setParameter("nnewsPublisher", news.getNewsPublisher());
		query.setParameter("nnewsPublishTime", news.getNewsPublishTime());
		query.setParameter("newId", news.getNewsId());
		query.executeUpdate();
	}
		
	public News findById(java.lang.Integer id) {
		log.debug("getting News instance with id: " + id);
		try {
			News instance = (News) getHibernateTemplate().get("daos.News", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(News instance) {
		log.debug("finding News instance by example");
		try {
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding News instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from News as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByNewsTitle(Object newsTitle) {
		return findByProperty(NEWS_TITLE, newsTitle);
	}

	public List findByNewsContent(Object newsContent) {
		return findByProperty(NEWS_CONTENT, newsContent);
	}

	public List findByNewsPublisher(Object newsPublisher) {
		return findByProperty(NEWS_PUBLISHER, newsPublisher);
	}

	public List findAll() {
		log.debug("finding all News instances");
		try {
			String queryString = "from News";
			return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public News merge(News detachedInstance) {
		log.debug("merging News instance");
		try {
			News result = (News) getHibernateTemplate().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(News instance) {
		log.debug("attaching dirty News instance");
		try {
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(News instance) {
		log.debug("attaching clean News instance");
		try {
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public static NewsDAO getFromApplicationContext(ApplicationContext ctx) {
		return (NewsDAO) ctx.getBean("NewsDAO");
	}
}